regardless of questions of growth or ultimate purpose we need to be able to do this if we want to persist for any significant length of time in any habitat, pla

regardless of questions of growth or ultimate purpose we need to be able to do this if we want to persist for any significant length of time in any habitat, planetary or otherwise a truly sustainable civilization can successfully manage its planetary (or ship- or station-borne) ecology and protect itself from threats with advanced technology equally well, and we are wildly immature in both capacities